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2 Sheets-Sheet 1. W. H. TAYLOR. Apparatus for Slottng Metal.

No. 234,089. Patented Nov. 2, |880.

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` l 2Sheets-Sheet 2. W. H. TAYLOR.

Apparatus for Slotting Metal.

No. 234.089. Patented Nov. 2, 1880.

WITJVESSEAS' I ./V VENTO WAR/95N H 7,3m op.

l .By his .dtorneys N. PETERSY PHOTlUTHOGRAPNER, WASHINGTON, D G.

IINTTED STATES PATENT Erica WARREN H. TAYLOR, OF STAMFORD, CONNECTICUT,ASSIGNOR TO THE YALE LOCK MANUFACTURING COMPANY, OF SAME PLACE.

APPARATUS FOR SLOTTING METAL.

SPECIFICATION forming part of Letters Patent No. 234,089, dated November2, 1880. Application filed April 11, 1878.

To all whom it may concern:

Be it known that I, WARREN H. TAYLOR, of Stamford, in the county ofFairfield and State of Connecticut, have invented an Improved Apparatusfor Slotting Metal, of which the following is a specification.

The principle of my invention is simply that of cutting or sawing intowork in devious lines to form irregular or curved ker's that shall beexactly alike.

The particular purpose I have in view is to form sinuous key-slots inthe hubs or cylinders of locks, which are adapted for the use ofsheet-metal keys with side bits or serrations, like the ordinarysecurity Yale lock-key. There are many practical considerations in favorof having the key-blade of such a key grooved or corrugatedlongitudinally, and there is little diflioulty in properly corrugatin gsuch a key-blade in the process of manufacture by the use of suitabledies; but the formation of a corresponding keyway in the lock hub orcylinder has heretofore been attended with considerable difficulty; andit is the object of my invention to render it easy and economical toform such keyways that shall be uniform for particular patterns of hubsor cylinders and that shall neatly iit the respecti've standard keys.

In the accompanying drawings, Figure l is a plan view of my apparatus,showing the use of a gig-saw, and Fig. 2 is a longitudinal section ofthe same. Fig. 3 is a longitudinal section, showing the use of aband-saw; and Figs. 4 and 5 are detached sections, exhibiting details.

A indicates a table, bench, or bed-plate, through which the sawB worksin an elongated transverse slot, b, to accommodate its vibrations. Onthis table is secured the reciprocating carriage C in suitable guidewaysD D. At the forward end of this carriage, immediately under the positionof the work to be slotted, is a slot, c, forming an open Way for the sawas the carriage is advanced to carry the work against it.

I employ a gig or band saw of the ordinary kind for line work, and itmay he operated in any one of the usual ways.

On the under side of the carriage I secure a plate, F, containing adouble-curved slot, j'. I attach rigidly to the rotary saw-framestandard an arm or lever, G, which carries on its outer end a stud, H,provided with a frictionroller, 7L, that enters the slot f ofthe plateF. This arm contains an elongated transverse slot for the accommodationof the vibrations of the saw, like that in the bed-plate; but as the armand saw vibrate together this slot need only be large enough to clearthe saw. Now, the shape of slot f is such that as the carriage advancesWith the work to the saw the friction-roller on the stud impin gesagainst the sides ol' the slot and gives to the arm G, and consequentlyto the rotary standard and saw, a vibratory motion, so that thedirection ofthe saw in the work is constantly changing, and a sinuouskerf or slot is formed. This cut of the saw is determined as to itspeculiar sinuosity and depth by the form of the cam-slot in the plate F,and all that will be necessary to get varying forms and depths of kerfswill be to take off one slotted plate and put on another with adifferent slot in its place.

The carriage may be rcciprocated either by hand or poW`cr-driVenmechanism, substantially such, for instance, as is used in smallmetal-planers.

Any suitable work-holder to secure the work to the carriage may beemployed, and although I intend my apparatus particularly for cuttingslots in key-hubs, it may be used for sinuously slotting other work.

When I use a band-saw I attach two arms, S S, rigidly to a rotarystandard, T, behind the saw-blade, and provide them with hardened-steelguides or bushings t, that engage with the sides of the saw above andbelow the work Without coming in contact with its teeth or back. Thelower arm carries the stud and friction-roller, and is provided with anaperture, u, in front of the saw to prevent its teeth from striking thearm. The lateral vibrations ofvthese arms in the manner alreadydescribed with respect to a gig-saw will cause the guides t, as the\vork-carrier advances, to bend or bear the band-saw slightly from sideto side, so that it will forni the desired irregular angul lar or curvedkort' of uniform contour and l l l l rotary standard, the arm carrying astud secured to said standard, and the reciprocating slottedguide-plate, substantially as described.

In testimony whereof I have hereunto subscribed my name.

WARREN H. TAYLOR.

depth in dit'erent key-hubs.

What I claim, and desire to secure by Let Witnesses:

E. D. OGDEN, Jr.,

The combination ot' the vibrating saw, its l SCHUYLER MERRITT.

